Demon x Demon reader

Y/N is one of the demons living in the underworld.. Well she is better than any demon before. For she is a demon spy, her power is strong and no one knows her weakness. She can kill whom ever she wants with a click of her fingers.
She has heard of prince P/N (princes name) But has never met him in person.
One day she has to Team up with him to find a demon that is giving an angle information.

(First time writing ;-; don't blame me that its bad!)